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CXGB(4) FreeBSD Kernel Interfaces Manual CXGB(4)
NAMEcxgb - Chelsio T3 10 Gigabit Ethernet adapter driver
SYNOPSIS
To compile this driver into the kernel, place the following lines in your
kernel configuration file:
devicefirmwaredevicecxgb
To load the driver as a module at boot time, place the following line in
loader.conf(5):
if_cxgb_load="YES"
DESCRIPTION
The cxgb driver supports Transmit/Receive checksum offload, Jumbo Frames,
TCP segmentation offload (TSO), Large Receive Offload (LRO), VLAN
hardware insertion / extraction, and VLAN checksum offload. For further
hardware information, see http://www.chelsio.com/.
For questions related to hardware requirements, refer to the
documentation supplied with your Chelsio T3 adapter. All hardware
requirements listed apply to use with FreeBSD.
Support for Jumbo Frames is provided via the interface MTU setting.
Selecting an MTU larger than 1500 bytes with the ifconfig(8) utility
configures the adapter to receive and transmit Jumbo Frames. The maximum
MTU size for Jumbo Frames is 9000.
For more information on configuring this device, see ifconfig(8).
HARDWARE
The cxgb driver supports 10 Gigabit and 1 Gigabit Ethernet adapters based
on the T3 and T3B chipset:
+o Chelsio 10GBase-CX4
+o Chelsio 10GBase-LR
+o Chelsio 10GBase-SR
LOADER TUNABLES
Tunables can be set at the loader(8) prompt before booting the kernel or
stored in loader.conf(5).
DIAGNOSTICScxgb%d:Unabletoallocatebusresource:memory A fatal initialization
error has occurred.
cxgb%d:Unabletoallocatebusresource:interrupt A fatal
initialization error has occurred.
cxgb%d:Couldnotfindfirmwareimage%s The appropriate firmware kld
module was not installed. This is a fatal initialization error.
SUPPORT
For general information and support, go to the Chelsio support website
at: http://www.chelsio.com/.
If an issue is identified with the released source code on the supported
kernel with a supported adapter, email the specific information related
to the issue to <support@chelsio.com>.
SEE ALSOaltq(4), arp(4), netintro(4), ng_ether(4), ifconfig(8)HISTORY
The cxgb device driver first appeared in FreeBSD 6.3 and FreeBSD 7.0.
AUTHORS
The cxgb driver was written by Kip Macy <kmacy@FreeBSD.org> with
substantial support from Scott Long <scottl@FreeBSD.org>.
FreeBSD 11.0-PRERELEASE March 14, 2007 FreeBSD 11.0-PRERELEASE